PEF81902FV1.1 Lantiq, PEF81902FV1.1 Datasheet - Page 110

• Manufacturer Part Number: PEF81902FV1.1
• Manufacturer: Lantiq

Specifications of PEF81902FV1.1

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Characteristics:
Every received frame is stored in RFIFO (first byte after opening flag to CRC field).
Additional information can be read from RSTA.
Transparent mode 1 (MDS2-0 = ’111’).
Characteristics:
A comparison is performed on the first byte after the opening flag with SAP1, SAP2 and
“group” SAPI (FE
RFIFO. Additional information can be read from RSTA.
Transparent mode 2 (MDS2-0 = ’101’).
Characteristics:
A comparison is performed only on the second byte after the opening flag, with TEI1,
TEI2 and group TEI (FF
Additional information is available in RSTA.
Extended transparent mode (MDS2-0 = ’100’).
Characteristics:
In extended transparent mode fully transparent data transmission/reception without
HDLC framing is performed i.e. without FLAG generation/recognition, CRC generation/
check and bitstuffing mechanism. This allows user specific protocol variations.
Also refer to
2.6.2
2.6.2.1
The 64-byte cyclic RFIFO buffer has variable FIFO block sizes (thresholds) of 4, 8, 16 or
32 bytes which can be selected by setting the corresponding RFBS bits in the EXMR
register. The variable block size allows an optimized HDLC processing concerning frame
length, I/O throughput and interrupt load.
The transfer protocol between HDLC FIFO and microcontroller is block orientated with
the microcontroller as master. The control of the data transfer between the CPU and the
T-SMINT
SMINT
There are three different interrupt indications in the ISTAH register concerned with the
reception of data:
Data Sheet
â
IX).
â
IX is handled via interrupts (T-SMINT
Data Reception
Structure and Control of the Receive FIFO
Chapter
H
/FC
TEI recognition
no address recognition
SAPI recognition
fully transparent
2.6.5.
H
H
). In the case of a match, all the following bytes are stored in
). In case of a match the rest of the frame is stored in the RFIFO.
96
â
IX
Host) and commands (Host
Functional Description
PEF 81902
2001-11-12
T-